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Una
Joined: 23 Sep 2007
Posts: 30
Location: Port Orchard, WA
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 Posted: Tue Oct 02, 2007 9:16 am Post subject: 931 bellhousing on a 924, questions.. |
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Ok, I found out that a 924 bellhousing won't work in my engine swap. Hopefully a 931 bellhousing does work, as promised. But.. Will a 931 bellhousing match up to my 924 torque tube? Did the bellhousings change at all as the transmissions changed? ie, do I have to have a matching bellhousing? I would imagine not, but the 931 on a 924 torque tube.. I'm kind of concerned about that one.
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Brian near Seattle, WA
'82 Porsche 924 |
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morghen
Joined: 21 Jan 2005
Posts: 9095
Location: Romania
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| Posted: Tue Oct 02, 2007 3:13 pm Post subject: |
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no...they are different. and i dont know if the 924 shaft would mate the audi motor. i think you will need to use a 931 torgue tube, gearbox and bellhousing for that audi engine.
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Min
Joined: 04 Nov 2002
Posts: 2368
Location: Vernon, British Columbia, Canada
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| Posted: Tue Oct 02, 2007 3:42 pm Post subject: |
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why won't a 924 bellhousing work for your engine swap?
Min
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Custom means it didn't come from a box.
1980 n/a with EDIS and Megasquirt II Injection. 7 different colors and counting. |
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Peter_in_AU
Joined: 29 Jul 2001
Posts: 2743
Location: Sydney, Australia
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| Posted: Tue Oct 02, 2007 7:13 pm Post subject: |
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I hope you're taking lots of photos. I've got your blog bookmarked.
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1979 924 (Gone to a better place)
1974 Lotus 7 S4 "Big Valve" Twin-cam (waiting)
1982 924 (As featured on Wikipedia)
Learn to love your multimeter and may the search be with you |
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Una
Joined: 23 Sep 2007
Posts: 30
Location: Port Orchard, WA
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| Posted: Tue Oct 02, 2007 10:23 pm Post subject: |
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| morghen wrote: | | no...they are different. and i dont know if the 924 shaft would mate the audi motor. i think you will need to use a 931 torgue tube, gearbox and bellhousing for that audi engine. |
This from the guy that WANTS my project to fail..
Yeah, I plan to update the blog real soon with pictures. The 924 bellhousing is too small to even fit around the audi flywheel. Not to mention only half the bolts line up, if that.
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Brian near Seattle, WA
'82 Porsche 924 |
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morghen
Joined: 21 Jan 2005
Posts: 9095
Location: Romania
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| Posted: Wed Oct 03, 2007 12:34 am Post subject: |
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hahaha...nah i dont want your project to fail, but you will need all that i mentioned above. + you will need to convert to hidraulic clutch  ...this means to drill big ass holes trough the firewall and get all the system from a 931/944 including the pedal assembly and master cyl complete with lines and i think that these are the minor mods you will have to do to get that engine runing compared to the rest of them
i've put a 931 engine into a 924 and it was not a piece of cake...you need all that stuff + you need professional tools....an elevator....basicaly you have to take everything out including the rear suspension.
so good luck ! and let us know
PS: if i were to swap an engine into the 924 i'd surely go for a V8 maby a porsche V8 
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Min
Joined: 04 Nov 2002
Posts: 2368
Location: Vernon, British Columbia, Canada
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| Posted: Wed Oct 03, 2007 2:38 am Post subject: |
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| Una wrote: | | Yeah, I plan to update the blog real soon with pictures. The 924 bellhousing is too small to even fit around the audi flywheel. Not to mention only half the bolts line up, if that. |
the 931 bellhousing has the same bolt pattern.
Min
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Custom means it didn't come from a box.
1980 n/a with EDIS and Megasquirt II Injection. 7 different colors and counting. |
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endwrench
Joined: 07 Dec 2002
Posts: 1631
Location: Victor, Montana
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| Posted: Wed Oct 03, 2007 7:31 am Post subject: |
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| Min wrote: | | Una wrote: | | Yeah, I plan to update the blog real soon with pictures. The 924 bellhousing is too small to even fit around the audi flywheel. Not to mention only half the bolts line up, if that. |
the 931 bellhousing has the same bolt pattern.
Min |
Yep, but it will contain a larger flywheel and clutch assembly.
Todd
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'79 924NA. Rebuilt 9.5:1, MSDS header, Mega Squirt Injection, MJLJ-EDIS Ignition, 1.6L Whipple Charger and Intercooler, 10lbs Boost, 944 Trans, Custom HD Clutch.
"simsport" said....superchargers are better than turbos its official!.... |
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Min
Joined: 04 Nov 2002
Posts: 2368
Location: Vernon, British Columbia, Canada
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| Posted: Wed Oct 03, 2007 8:24 am Post subject: |
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| endwrench wrote: | Yep, but it will contain a larger flywheel and clutch assembly.
Todd |
I like to call this part "fun with tools"
Min
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Una
Joined: 23 Sep 2007
Posts: 30
Location: Port Orchard, WA
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| Posted: Wed Oct 03, 2007 8:53 am Post subject: |
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Well if it's the same bolt pattern, saying it "bolts right up" is kind of bending the truth. Half the bolts line up, half of them don't.. I do believe some things are over-engineered, but that's really pushing the limits.
I'll wait till I have a 931 bellhousing in my hands to see exactly why it won't bolt to my torque tube. That torque tube just has a 1/4" sheet of steel on the end of it where it bolts to the bell housing. I could fairly easily cut that off and weld on a new one with a different bolt pattern if I had to. The input shaft has nothing to do with the bellhousing, it doesn't even touch it.
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Brian near Seattle, WA
'82 Porsche 924 |
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Una
Joined: 23 Sep 2007
Posts: 30
Location: Port Orchard, WA
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| Posted: Tue Oct 16, 2007 9:24 am Post subject: |
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| morghen wrote: | | no...they are different. and i dont know if the 924 shaft would mate the audi motor. i think you will need to use a 931 torgue tube, gearbox and bellhousing for that audi engine. |
Wrong wrong wrong wrong.. 931 bellhousing bolts right up to the 924 torque tube. Bolt holes line up just fine, alignment dowls fit snugly just like the 924 bellhousing. Input shaft sticks through just fine, and yes, the 924 input shaft fits the Audi pilot bearing flawlessly.
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Brian near Seattle, WA
'82 Porsche 924 |
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Min
Joined: 04 Nov 2002
Posts: 2368
Location: Vernon, British Columbia, Canada
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| Posted: Tue Oct 16, 2007 12:21 pm Post subject: |
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| Una wrote: | | Wrong wrong wrong wrong.. 931 bellhousing bolts right up to the 924 torque tube. Bolt holes line up just fine, alignment dowls fit snugly just like the 924 bellhousing. Input shaft sticks through just fine, and yes, the 924 input shaft fits the Audi pilot bearing flawlessly. |
Thats what I figured, but I didn't want to say anything. I have a motorless 931 out in the driveway, so I'm interested in this project a bit, does the 931 bellhousing fit over the audi clutch/etc better than the na one did?
Min
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1980 n/a with EDIS and Megasquirt II Injection. 7 different colors and counting. |
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morghen
Joined: 21 Jan 2005
Posts: 9095
Location: Romania
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| Posted: Tue Oct 16, 2007 4:23 pm Post subject: |
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hey..great news ! i'm glad that it all worked out nicely !
keep us posted ! 
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